37. While ___ to school we always ___ a bus. A) going/take B) went/take C) shall go/will take D) had gone/took E) goes/takes

The correct answer is E) goes/takes.

Explanation: The sentence describes a habitual action. "While going to school" requires an additional auxiliary verb. Option B and D uses past tense and past perfect tense which is grammatically incorrect. Option C uses future tense, which is not suitable. The correct sentence is "While going to school, we always take a bus.", since the question is using present tense, we should look for the present tense answer, and so only E) goes/takes is applicable here. However, the correct way is to say E) going/take.